JPH08118061A - Worktable for laser beam machine - Google Patents

Abstract

PURPOSE: To provide a worktable for a laser beam machine improving a working speed without degrading working precision. CONSTITUTION: In the case of a machining head 13 that is freely movable back and forth in one direction, a worktable 1 is constituted of an upper table 25 and a lower table 27 that are freely movable back and forth in the same direction orthogonal to the moving direction of the machining head 13, the lower table 27 is moved toward a base 29 and is positioned, the upper table 25 is positioned in the same direction as the lower table 27. In the case of a fixed machining head 55, a first lower table 63 is moved in the first direction toward a base 71, and is positioned and a first upper table 65 is positioned moved in the same first direction toward the first lower table 63, thereby performing positioning movable in the first direction. A second lower table 67 is moved in the second direction orthogonal to the first direction toward the first upper table 65, and a second upper table 69 is moved in the second direction toward this second lower table 67 and is positioned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work table for a laser processing machine, and more particularly to a work table for a laser processing machine that can move at high speed and with high accuracy.

[0002]

2. Description of the Related Art As shown in FIG. 3, in a conventional laser processing machine 205 for moving and positioning a work table 201 in the X-axis direction and moving and positioning a working head 203 in the Y-axis direction, a laser processing machine 205 is used. Oscillator 20
Laser beam LB emitted from the reflection mirrors 209, 21
The laser beam LB is emitted from the nozzle 213 provided on the processing head 203 so as to be vertically movable by changing the direction by 1.
The movement and positioning of the processing head 203 at this time is performed via the Y-axis ball nut 221 by the Y-axis servo motor 217 provided on the side surface of the frame 215 straddling the work table 201 rotatingly driving the Y-axis ball screw 219. Be seen.

On the other hand, the work table 201 is the base 2
A pair of guide rails 225 and 225 provided on 23
Is movable in the X-axis direction. Further, the work table 201 is provided with an X-axis ball screw nut 231 which is screwed into an X-axis ball screw 229 which is rotationally driven by an X-axis servomotor 227. Therefore, when the X-axis servo motor 227 rotates the X-axis ball screw 229, the work table 201 moves in the X-axis direction.

With the above construction, the machining head 203 is positioned in the Y-axis direction, and the work table 201 is positioned in the X-axis direction to perform desired cutting.

[0005]

However, in such a conventional technique, there is a limit to the speed and accuracy with which the work table 201 is moved. Table 2
The movement of 01 cannot follow. Therefore, there is a problem that the processing speed is limited to the moving speed of the work table 201, especially in the case of a thin plate.

An object of the present invention is to pay attention to the above-mentioned conventional techniques, and to provide a work table for a laser processing machine in which the processing speed is increased without lowering the processing accuracy. It is in.

[0007]

In order to achieve the above-mentioned object, a work table of a laser beam machine according to a first aspect of the present invention mounts a workpiece to be laser-machined and irradiates a laser beam. A work table of a laser processing machine that can be reciprocally moved in another direction orthogonal to the one direction with respect to a machining head that is reciprocally movable in one direction, the work table being reciprocally moved in the other direction on a base. It is characterized by comprising a lower table which is provided so as to be positionable, and an upper table which is provided on the lower table so as to be capable of reciprocatingly moving in the other direction with respect to the lower table and being positioned.

In order to achieve the above-mentioned object, the work table of the laser processing machine according to the second aspect of the present invention mounts a work to be laser-processed and fixes the processing head to irradiate a laser beam. A work table of a laser processing machine that reciprocates in a first direction and a second direction orthogonal to each other, the work table being provided on a base and reciprocating in the first direction with respect to the base. A first lower table that is movable and positionable, and a first upper table that is provided on the first lower table and that is reciprocally movable and positionable in the first direction with respect to the first lower table;
A second lower table provided on the first upper table and reciprocatingly movable in the second direction with respect to the first upper table, and a second lower table provided on the second lower table. A second upper table which is reciprocally movable and positionable in the second direction with respect to the second lower table.

[0009]

In the work table of the laser beam machine according to the first aspect, the work table is reciprocated and positioned in the other direction which is orthogonal to the machining head provided so as to reciprocate and position in one direction. Laser processing is performed by irradiating the placed work with a laser beam. This work table is also composed of an upper table and a lower table which are reciprocally movable and positionable in the other direction, the lower table is reciprocally moved and positioned in the other direction with respect to the base, and the upper table is further positioned with respect to the lower table. By reciprocating and positioning in the other direction,
It is for moving and positioning.

In the work table of the laser beam machine according to the second aspect, the work table is reciprocatively positioned in both the first and second directions with respect to the machining head fixed in the first direction and the second direction orthogonal to each other. Then, laser processing is performed by irradiating the work placed on the work table with a laser beam. In this work table, the first lower table is moved and positioned with respect to the base in the first direction, and the first upper table is moved and positioned with respect to the first lower table in the same first direction. Performs movement positioning in one direction. Further, the second lower table is moved and positioned with respect to the first upper table in a second direction orthogonal to the first direction, and the second upper table is second with respect to the second lower table. It is for moving and positioning in the direction of.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment in which the work table 1 according to the present invention is applied only in the X-axis direction as another direction.

In FIG. 1, a laser beam machine 3 has a work table 1 and a frame 5 which extends across the work table 1. A guide rail 7, a Y-axis servomotor 9, and a Y-axis ball screw 11 are provided on the side surface of the frame 5.
Is provided. That is, the processing head 13 is equipped with the Y-axis ball nut 15 that is screwed into the Y-axis ball screw 11, and the Y-axis servomotor 9 drives the Y-axis ball screw 11 to rotate in the Y-axis direction as one direction. Reciprocating movement is positioned.

Further, the laser beam LB emitted from the laser oscillator 17 changes its direction by the reflecting mirrors 19 and 21, and is irradiated onto the work W on the work table 1 from the nozzle 23 which moves up and down with respect to the processing head 13. Work W
Is cut into pieces.

On the other hand, the work table 1 is the upper table 2
5 and the lower table 27. That is,
The lower table 27 is reciprocally movable and positionable in the X-axis direction along a pair of guide rails 31 provided on the base 29, and along a pair of guide rails 33 provided on the upper surface of the lower table 27. The upper table 25 is reciprocally movable in the X-axis direction.

On the base 29, a lower table 27 is provided.
An X-axis lower servomotor 37 having an X-axis lower ball screw 35 mounted thereon is provided to move the. In response to this,
An X-axis lower ball nut 39 that is screwed into an X-axis lower ball screw 35 is attached to the center of the lower surface of the lower table 27, and sliders 41 that travel on the guide rails 31 are provided at the four corners of the lower surface. ing.

Further, on the upper surface of the lower table 27, there is provided an X-axis upper servomotor 45 to which an X-axis upper ball screw 43 is attached in order to move the upper table 25. Correspondingly, an X-axis upper ball nut 47 screwed into the X-axis upper ball screw 43 is attached to the center of the lower surface of the upper table 25, and the guide rails 33 are provided at the four corners of the lower surface.
A slider 49 running above is provided.

With the above-described structure, the X-axis lower servomotor 37 performs the X-axis movement movement positioning of the work table 1, that is, the movement positioning of the upper table 25.
The lower axis ball screw 35 is rotationally driven to move and position the lower table 27 relative to the base 29, and at the same time, the X axis servo motor 45 rotationally drives the X axis ball screw 43 to move the upper table 25 relative to the lower table 27. This is done in two steps by moving and positioning.

Therefore, the moving speed of the work table 1, that is, the upper table 25 in the X-axis direction becomes twice as fast as usual,
Moreover, since the movement accuracy is the same as usual, high-speed machining is possible.

Next, FIG. 2 shows a second embodiment in which the work table 51 according to the present invention is applied in the biaxial directions of the Y-axis direction as the first direction and the X-axis direction as the second direction. There is.

In FIG. 2, in the laser processing machine 53, the processing head 55 is fixed to a frame (not shown) in the X-axis direction and the Y-axis direction. Further, the laser beam LB emitted from the laser oscillator 57 is changed in direction by the reflecting mirror 59, and is irradiated onto the work W on the work table 51 from the nozzle 61 which is vertically movable with respect to the processing head 55.

On the other hand, the work table 51 comprises a Y-axis lower table 63, a Y-axis upper table 65, an X-axis lower table 67 and an X-axis upper table 69.

That is, the Y-axis lower table 63 is reciprocally movable in the Y-axis direction along a pair of Y-axis direction guide rails 73 provided on the base 71. The Y-axis upper table 65 is reciprocally movable in the Y-axis direction along a pair of Y-axis direction guide rails 75 provided in the.

Further, an X-axis lower table 67 is reciprocally movable in the X-axis direction along a pair of X-axis direction guide rails 77 provided on the upper surface of the Y-axis upper table 65. The X-axis upper table 6 is provided along a pair of X-axis direction guide rails 79 provided on the upper surface of the table 67.
9 is reciprocally movable in the X-axis direction.

A Y-axis lower ball screw 81 is mounted on the base 71 to move the Y-axis lower table 63.
An under-axis servomotor 83 is provided. Correspondingly, Y-axis lower ball nuts 85 that are screwed into the Y-axis lower ball screw 81 are attached to the center of the lower surface of the Y-axis lower table 63, and along the guide rails 73 at the four corners of the lower surface. A slider 87 is provided for traveling.

Further, on the upper surface of the Y-axis lower table 63,
To move the Y-axis table 65, the Y-axis ball screw 8
A Y-axis servomotor 91, on which 9 is mounted, is provided. Correspondingly, Y-axis ball nuts 93 that are screwed into the Y-axis ball screw 89 are attached to the center of the lower surface of the Y-axis table 65, and the four corners of the lower surface are guided along the guide rails 75. A slider 95 is provided for traveling.

Further, on the upper surface of the Y-axis upper table 65, X
X-axis lower ball screw 97 to move the lower shaft table 67.
An X-axis lower servomotor 99 mounted with is mounted.
Correspondingly, an X-axis lower ball nut 101 that is screwed into an X-axis lower ball screw 97 is attached to the center of the lower surface of the X-axis lower table 67, and along the guide rails 77 at the four corners of the lower surface. A slider 103 that travels along the path is provided.

Further, on the upper surface of the X-axis lower table 67,
X-axis ball screw 1 to move the X-axis table 69
An X-axis servo motor 107 equipped with 05 is provided. Correspondingly, an X-axis upper ball nut 109 that is screwed into the X-axis upper ball screw 105 is attached to the center of the lower end of the X-axis upper table 69, and guide rails 79 are provided at the four corners of the lower surface. A slider 111 that travels by itself is provided.

With the above-described structure, the work table 51 is moved and positioned, that is, the X-axis upper table 6 is arranged.
In the movement positioning of 9, the Y-axis lower servo motor 83 rotationally drives the Y-axis lower ball screw 81 to move and position the Y-axis lower table 63 in the Y-axis direction with respect to the base 71, and at the same time, to move the Y-axis upper servo. When the motor 91 rotationally drives the Y-axis ball screw 89, the Y-axis table 6
5 is moved and positioned in the Y-axis direction with respect to the Y-axis lower table 63, and the moving and positioning in the Y-axis direction is performed in two steps.

Subsequently, the X-axis lower servo motor 99 rotationally drives the X-axis lower ball screw 97 to move and position the X-axis lower table 67 with respect to the Y-axis upper table 65 in the X-axis direction, and at the same time, to move the X-axis lower table 67. The servo motor 107 rotationally drives the X-axis ball screw 105 to move and position the X-axis upper table 69 with respect to the X-axis lower table 67 in the X-axis direction to perform the X-axis direction positioning in two steps. Therefore, the work table 51 is moved and positioned in four stages in total.

Therefore, the moving speeds of the work table 51 in the X-axis direction and the Y-axis direction are both doubled as usual, and the moving accuracy is not lowered, so that high-speed machining is possible. Therefore, a two-dimensional cutting such as a circular shape can be performed without lowering the accuracy. For example, individual servo motors 83, 9
A circle of 200 mm can be cut out by instructing 1,99,107 to cut out a circle of 100 mm in diameter.

The present invention is not limited to the above-described embodiments, but can be implemented in other modes by making appropriate changes. That is, in the above-mentioned embodiment, the case where the work tables 1 and 51 are moved by the ball screws 35, 43, 81, 89, 97 and 105 and the ball nuts 39, 47, 85, 93, 101 and 109 has been described. The same effect can be obtained by using other moving means such as a rack and a pinion gear.

Further, the upper table 25, the lower table 27, the Y-axis lower table 63, the Y-axis upper table 65, the X-axis lower table 67, and the X-axis upper table 69 are connected by one drive each by a gear or a timing belt. You may make it drive.

In the second embodiment, the X-axis moving table is provided on the Y-axis moving table. Conversely, the X-axis moving table is provided below the Y-axis moving table. It goes without saying that a moving table for directions may be provided.

[0035]

The work table of the laser beam machine according to the first aspect of the present invention is as described above, and can be reciprocally moved in one direction. Laser processing is performed by reciprocating positioning and irradiating a laser beam on a workpiece placed on the workpiece table. This work table is also composed of an upper table and a lower table which can be reciprocally moved and positioned in the other direction, the lower table is moved and positioned with respect to the base in the other direction, and the upper table is other than the lower table. By moving and positioning in the direction, it is possible to move and position in two stages.
It can be moved and positioned at twice the speed, and the positioning accuracy does not deteriorate.

In the work table of the laser processing machine of the present invention according to claim 2, the work table is moved in both the first and second directions with respect to the processing head fixed in the first direction and the second direction orthogonal to each other. Laser processing is performed by moving and positioning and irradiating a laser beam to the workpiece placed on the workpiece table. In this work table, the first lower table is moved and positioned with respect to the base in the first direction, and the first upper table is moved and positioned with respect to the first lower table in the same first direction. Performs movement positioning in one direction. Further, the second lower table is moved and positioned with respect to the first upper table in a second direction orthogonal to the first direction, and the second upper table is second with respect to the second lower table. It is for moving and positioning in the direction of. For this reason, since it moves in two directions in each direction, the moving speed in each direction doubles. Further, since the moving speed in the two directions orthogonal to each other is also doubled, the two-dimensional cutting such as a circle can be processed at the double speed, and the accuracy is not deteriorated.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a work table of a laser processing machine according to the present invention.

FIG. 2 is a perspective view showing a second embodiment of the work table of the laser processing machine according to the present invention.

FIG. 3 is a perspective view showing a work table of a conventional laser processing machine.

[Explanation of symbols]

 1, 51 Work table 3, 53 Laser processing machine 13, 55 Processing head 25 Upper table 27 Lower table 29, 71 Base 63 Y-axis lower table (first lower table) 65 Y-axis upper table (first upper table) 67 X-axis lower table (second lower table) 69 X-axis upper table (second upper table) W work LB laser beam

Claims (2)

[Claims] 1. A laser which is mounted on a workpiece to be laser-processed and which is reciprocally movable in another direction orthogonal to the one direction with respect to a machining head which is reciprocally movable in one direction to irradiate a laser beam. A work table of a processing machine, wherein the work table is provided on a base for reciprocating and positioning in the other direction, and a lower table on the lower table for reciprocating and positioning in the other direction. A work table for a laser processing machine, comprising: an upper table freely provided. 2. A laser processing which mounts a workpiece to be laser processed and reciprocates in a first direction and a second direction orthogonal to a processing head fixed to irradiate a laser beam. A work table of a machine, wherein the work table is provided on the base, and is provided on the first lower table that is reciprocally movable in the first direction and positioned with respect to the base. And a first upper table which is reciprocally movable and positionable in the first direction with respect to the first lower table, and the second upper table is provided on the first upper table. And a second lower table which is reciprocally movable in the direction of, and a second upper table which is provided on the second lower table and is capable of reciprocating and positioning in the second direction with respect to the second lower table. And, A work table for laser processing machines.